The nurses at SLU Hospital are represented by National Nurses Organizing Committee-Missouri/National Nurses United, which is currently working to organize at Des Peres Hospital. NNU and SEIU's two unions have been working together since 2009 to recruit additional members.

Des Peres nurses are scheduled to vote June 22 on whether they want to be represented by NNU.

Dallas-based Tenet, led by CEO Trevor Fetter, owns and operates 50 hospitals in 12 states. The for-profit company reported net operating revenue of $2.2 billion in 2011, a 5.4 percent increase from 2010.